The best replacement for cannula is catheter.

The best alternatives to cannula are rated as following:
★★★★★  catheter
★★★  cannula
★★★  needle
★★★  face mask
★★★  fistula
★★★  branula
★★  venflon
★★  mask
★★  non rebreather
★★  ventimask
★  nasal cannula
★  non rebreather mask
★  oxygen mask
★  venturi mask
★  blade needle
★  prongs
  simple mask
  oxymizer
  nonrebreather

Your alternative for cannula is not listed? Suggest!
Speaking about cannula, one probably shouldn't forget about co2 monitoring.

Other search terms related to cannula and their ratings are:
★★★★★ co2 monitoring
★★★★ end tidal co2
★★★ trach
★★★ obturator
★ capnography
★ bubble cpap
cpap machine
You have in mind a companion for cannula and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cannula in all years. Click on graph for more.
cannula
catheter
cannula